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(require '[tech.v3.dataset :as ds]
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'[tech.v3.datatype.functional :as dfn])
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(defn add-sum
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[dataframe]
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(assoc dataframe
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"SUM"
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(apply dfn/+ (map dataframe (ds/column-names dataframe)))))
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(ds/write! (add-sum (ds/->dataset "resources/input.csv")) "resources/output.csv")
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